Loci

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  Start with a photo of your room and a list.

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  Your room is the memory palace. Try it in one tap.

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  Each stop gets a short, strange scene.

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  Lights out. Say each item to light its stop.

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  AI finds the objects. Code joins them into one route.

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  Every stop green, the whole room is back.

Inspiration

The memory palace is an old trick that memory champions still use. But building one by hand takes a long time, so most people never try it. (Add your own reason here, one line.)

What it does

• Take a photo of your room, or use an example room.
• Paste a list of 3 to 12 items to learn, in order.
• AI finds objects in the photo. Each item gets its own stop on one route.
• Each stop gets a short, strange scene to help you remember.
• Lights out: say or type each item. A right answer lights up its stop.
• Retry the misses until every stop is green.
• Everything stays on your device. No sign-up.

How we built it

• Planned with the Devpost Learn Skill Pack: scope → PRD → spec → build checklist.
• React + Vite + TypeScript on Vercel.
• Gemini finds the objects, DeepSeek writes the scenes. Each backs up the other.
• Plain code picks the route and checks every answer. The AI never scores you.
• Voice uses the browser's own speech recognition. Typing always works.

Challenges we ran into

• A fair answer checker: one typo per word is fine, but short words must be exact.
• Scenes kept dropping the real word, until one example in the prompt fixed it.
• Gemini's free quota ran out, so each step falls back to other models.

Accomplishments that we're proud of

• It works end to end, live: from a photo to every light on.
• Anyone can try it in one tap, with no photo and no wait.
• 99 unit tests and 29 browser checks.

What we learned

• Planning first made every build step easy to check.
• Let the AI suggest, and let plain code decide.
• Real use finds real bugs. Recording the demo found three voice bugs.

What's next for Loci

• Reminders to walk a palace again: tomorrow, in 3 days, in a week.
• Longer lists across more rooms.
• Move a pin or redo a scene.
• Testing with real students.

Built With

• deepseek
• gemini
• indexeddb
• playwright
• react
• typescript
• vercel
• vite
• vitest
• web-speech-api